"A cavalry charge can only succeed...

[Bidermann]

They did go into action with sword and pistol, and carried out the odd charge.But they were mainly kept in the reserve for the break through which did not come,or fought as infantry in threnches. Near the end of the war they did have some small success .
One action, the Germans were dismounting from a train and were caught unformed . Another action which would of gone in tha pages of history was the British charge on Germnan field guns which were deployed.The attack started well but as the charge came close to the guns a small wire fence ,not seen when the charge started ,now stoped the charge full stop and men and horses were cut down

The main action they never took part in but should of done was the three day battle at Amiens,after the tanks and infantry had cut through the german lines and had open fields in front of them. The cavalry were to far back to of any use,so for 4 years the generals had waited to use the cavalry but when the chance came they were not there.

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on the easten front and in the middle east cavalry were of more use and had the last full charges .

Going on from that I would love to of seen a full cavalry charge with all its power and force.